The Guns Of Brimstone
Colt Single Action Army Revolver 1873
Colt SAR 1873
From Wikipedia: The Colt Single Action Army (also known as the Model P, Peacemaker, M1873, Single Action Army, SAA, and Colt 45) is a single action revolver with a revolving cylinder holding six metallic cartridges. It was designed for the U.S. government service revolver trials of 1873 by Colt’s Patent Firearms Manufacturing Company, today Colt’s Manufacturing Company, and adopted as the standard military service revolver until 1892.